saxman2651 saxman2651

29-03-2024
Mathematics

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A sample of size n=80 is drawn from a normal population whose standard deviation is Σ =6.8. The sample mean is barx =40.41. a. Construct a 90 confidence interval for mu. b. If the population mean is μ=40, What is the probability that the sample mean is greater than or equal to barx?

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